Study and understanding of n/γ discrimination processes in organic plastic scintillators

M. Hamel 1 P. Blanc 1 L. Rocha 1 S. Normand 1 R. Pansu 2
1 LCAE - Laboratoire Capteurs et Architectures Electroniques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
2 PPSM - Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires
Abstract : For 50 years, it was assumed that unlike liquid scintillators or organic crystals, plastic scintillators were not able to discriminate fast neutrons from gamma. In this work, we will demonstrate that triplet-triplet annihilations (which are responsible of n/γ discrimination) can occur even in plastic scintillators, following certain conditions. Thus, the presentation will deal with the chemical preparation, the characterization and the comparison of n/γ pulse shape discrimination of various plastic scintillators. To this aim, scale-up of the process allowed us to prepare a Ø 100 mm × ≈ 110 mm thick.
Keywords : Pulse shape discrimination Triplet-triplet annihilation Explosives Fluorescence Ionization Neutrons Radiology Scintillation counters Plastic scintillator Liquid scintillator Home land security Helium-3 Fast neutrons Chemical preparation
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Conference papers
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https://hal-cea.archives-ouvertes.fr/cea-01823913
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Submitted on : Tuesday, June 26, 2018 - 3:46:42 PM
Last modification on : Wednesday, September 4, 2019 - 1:40:15 PM

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M. Hamel, P. Blanc, L. Rocha, S. Normand, R. Pansu. Study and understanding of n/γ discrimination processes in organic plastic scintillators. Proc. SPIE 8710, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV, Apr 2013, Baltimore, MD, United States. pp.87101F, ⟨10.1117/12.2011330⟩. ⟨cea-01823913⟩

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